Stamping tool

ABSTRACT

A stamping tool for stamping a product having a base plate and a contact arm includes an assistant block, a supporting element assembled in the assistant block, a molding floater slidably mounted to one side of the assistant block and a pressing element driving the molding floater to slide downward to secure the base plate therebetween. A plurality of resisting sections are formed on a top of the supporting element and stretched beyond a top of the assistant block. A top of the molding floater extends to form a bending board suspended over the resisting sections. A molding punch is movably inserted in the pressing element with a bottom end thereof projected out of the pressing element for making the contact arm pass through two corresponding resisting sections to be bent towards a bottom of the bending board, wherein the resisting sections resist against the bottom of the bending board.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention generally relates to a stamping tool, and moreparticularly to a stamping tool capable of stamping a product.

2. The Related Art

Currently, metallic stamped products are widely used, especially in theelectronic and digital product fields, such as a digital camera, amobile phone, MP3, MP4 and so on. So, stamping tools are widely used inthe manufacturing field. In the process of producing the metallicstamped products, structure of the stamping tool decides quality of themetallic stamped product. The stamping tool is generally composed of anupper mold and a lower mold. The lower mold has a holding component usedfor fastening and supporting a pre-stamped product. The upper moldincludes a molding punch for pressing and bending the pre-stampedproduct. However, in the process of stamping the product, the holdingcomponent is apt to be broken off so that often results in a deformationof the product. As a result, the stamping tool often need be repairedafter being used for stamping the product and has a higher mending rate,and the metallic stamped product has a lower product rate.

SUMMARY OF THE INVENTION

An object of the present invention is to provide a stamping tool forstamping a product which has a base plate, and a contact arm extendedfrom one end of the base plate. The stamping tool includes an upper moldand a lower mold. The lower mold has an assistant block, a supportingelement positioned in the assistant block, and a molding floaterslidably mounted to one side of the assistant block and capable ofsliding up and down with respect to the supporting element. A pluralityof resisting sections are formed on a top of the supporting element atregular intervals and stretched beyond a top of the assistant block. Oneside edge of a top of the molding floater adjacent to the assistantblock perpendicularly extending to form a bending board suspended overthe resisting sections. The upper mold matched with the lower mold andincludes a pressing element capable of driving the molding floater toslide downward and further securing the base plate of the productbetween the molding floater and the pressing element, with the contactarm being suspended under the bending board. A molding punch is movablyinserted in the pressing element with a bottom end thereof capable ofbeing exposed outward from a bottom of the pressing element for stampingthe contact arm of the product to make the contact arm pass through twocorresponding resisting sections of the supporting element to be benttowards a bottom of the bending board, wherein the resisting sectionsresist against the bottom of the bending board to strengthen the bendingboard during the contact arm is stamped by the molding punch.

As described above, during the contact arm of the product is bent by themolding punch, tops of the resisting sections resist against the bottomof the bending board of the molding floater to realize the bend of thecontact arm between corresponding two resisting sections, so that caneffectively avoid the bending board of the molding floater being brokenoff. So, deformation of the product can be effectively avoided.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be apparent to those skilled in the art byreading the following description, with reference to the attacheddrawings, in which:

FIG. 1 is an exploded perspective view of a stamping tool according tothe present invention;

FIG. 2 is a cross-sectional view of the stamping tool of FIG. 1, whereinthe stamping tool is at an open state;

FIG. 3 is a cross-sectional view of the stamping tool of FIG. 1, whereinthe stamping tool is at a closed state; and

FIG. 4 is a cross-sectional view of the stamping tool of FIG. 1, whereinthe stamping tool is closed to stamp a product.

DETAILED DESCRIPTION OF THE EMBODIMENT

Referring to FIG. 1, an embodiment of a stamping tool 100 according tothe present invention is shown. The stamping tool 100 is adapted forstamping a product 200 which has a material belt 202. A plurality ofelongated base plates 203 is connected with one side edge of thematerial belt 202. A free end of each base plate 203 is bent downwardand extends slantwise towards the base plate 203 to form a contact arm201. The stamping tool 100 includes an upper mold (not shown) and alower mold (not shown) matched with the upper mold.

Referring to FIG. 1, the upper mold includes a molding punch 10 and apressing element 20. The molding punch 10 has an elongated base pin 11and a punching portion 12 protruded at a middle of a bottom of the basepin 11. The base pin 11 of the molding punch 10 vertically penetratesthrough the pressing element 20 to be movably inserted in the pressingelement 20, with the punching portion 12 being exposed outward under thepressing element 20. The pressing element 20 is used for fastening thebase plates 203 and the material belt 202 of the product 200 in thestamping tool 100 so as to effectively stamp the product 200.

Referring to FIG. 1 and FIG. 2, the lower mold includes an assistantblock 40, a supporting element 50 vertically disposed in the assistantblock 40, and a molding floater 30 slidably mounted to one side of theassistant block 40, wherein the molding floater 30 can slide up and downwith respect to the supporting element 50. A side of a top of themolding floater 30 adjacent to the assistant block 40 protrudes upwardto form a rectangular protrusion 31. One side edge of a top of theprotrusion 31 facing the assistant block 40 perpendicularly extends toform a bending board 311 suspended over the supporting element 50. Theassistant block 40 is of a rectangular shape and has a rectangularpositioning fillister 42 vertically penetrating therethrough from top tobottom thereof. Two ends of one side of the top of the assistant block40 away from the molding floater 30 protrude upward to form tworectangular pillars 43 with a space 41 being formed therebetween. Thesupporting element 50 has a base portion 52 of a rectangular board-shapeand a plurality of resisting sections 51 protruded upward from a top ofthe base portion 52 at regular intervals, wherein the base portion 52 isinserted upward in the positioning fillister 42 of the assistant block40, with the resisting sections 51 being stretched beyond the top of theassistant block 40 and between the space 41 and the protrusion 31. Themolding floater 30 can be pressed downward with respect to thesupporting element 50 by the pressing element 20 when the stamping tool100 is closed, until the resisting sections 51 resist against a bottomof the bending board 311 of the protrusion 31 for avoiding a fracture ofthe bending board 311 of the protrusion 31.

Referring to FIG. 2 and FIG. 4, before the stamping tool 100 is closed,the material belt 202 is located on the protrusion 31 of the moldingfloater 30 and the base plates 203 are located on the bending board 311,with the contact arms 201 being suspended under the bending board 311.When the stamping tool 100 is closed, the upper mold moves towards thelower mold until a bottom of the pressing element 20 is pressed on thematerial belt 202 and the base plates 203 so as to secure the materialbelt 202 and the base plates 203 between the pressing element 20 and themolding floater 30. Then, the base pin 11 is pushed downward and thepunching portion 12 projects into the space 41 for stamping the contactarm 201 of the product 200 to make the contact arm 201 pass through twocorresponding resisting sections 51 of the supporting element 50 to bebent towards the bottom of the bending board 311. In the process ofclosing the stamping tool 100, the pressing element 20 further drivesthe molding floater 30 to slide downward till the resisting sections 51resist against the bottom of the bending board 311 so as to avoid afracture of the bending board 311 of the protrusion 31 during thecontact arm 201 is bent by the punching portion 12.

Referring to FIG. 1 and FIG. 2, after finishing stamping the product 200in the stamping tool 100, the upper mold moves upward away from thelower mold. Then the molding floater 30 moves upward away from theassistant block 40 and the supporting element 50 so as to convenientlyeject the product 200 out of the stamping tool 100.

As described above, during the contact arm 201 of the product 200 isbent by the punching portion 12, tops of the resisting sections 51resist against the bottom of the bending board 311 of the moldingfloater 30 to realize the bend of the contact arm 201 betweencorresponding two resisting sections 51, so that can effectively avoidthe bending board 311 of the protrusion 31 being broken off. So,deformation of the product 200 can be effectively avoided.

1. A stamping tool for stamping a product which has a base plate, and acontact arm extended from one end of the base plate, comprising: a lowermold having an assistant block, a supporting element positioned in theassistant block, and a molding floater slidably mounted to one side ofthe assistant block and capable of sliding up and down with respect tothe supporting element, a plurality of resisting sections being formedon a top of the supporting element at regular intervals and stretchedbeyond a top of the assistant block, one side edge of a top of themolding floater adjacent to the assistant block perpendicularlyextending to form a bending board suspended over the resisting sections;and an upper mold matched with the lower mold and including a pressingelement capable of driving the molding floater to slide downward andfurther securing the base plate of the product between the moldingfloater and the pressing element, with the contact arm being suspendedunder the bending board, a molding punch being movably inserted in thepressing element with a bottom end thereof capable of being exposedoutward from a bottom of the pressing element for stamping the contactarm of the product to make the contact arm pass through twocorresponding resisting sections of the supporting element to be benttowards a bottom of the bending board, wherein the resisting sectionsresist against the bottom of the bending board to strengthen the bendingboard during the contact arm is stamped by the molding punch.
 2. Thestamping tool as claimed in claim 1, wherein the molding punch has anelongated base pin movably inserted in the pressing element, and apunching portion protruded at a bottom of the base pin for stamping thecontact arm of the product.
 3. The stamping tool as claimed in claim 1,wherein the assistant block has a positioning fillister penetratingtherethrough for positioning the supporting element therein, one side ofthe top of the assistant block away from the molding floater protrudesupward to form two pillars with a space being formed therebetween forreceiving the bottom end of the molding punch therein, the resistingsections are stretched between the space and the molding floater.